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alishaheen

join:2013-06-18

IPv6 Help

Hi All,

i am new to ipv6, and want to setup a simple ipv6 lab, before going ahead, i have few questions.

1. which ipv6 range can be assigned in system, is there any specific range (eg,. private ip address in ipv4 10. 172. 192.168.) , which i can assign ?

2. There is a ipv6 ip in the system staring with ( fe80::82c1::X:X:X..),
what does this address represents, shall i remove this address and assign any ipv6 address.

3. Is there any subnet mask concept in ipv6, if yes, how it works.

Regards,
Ashraf

quesix

join:2005-12-19
Cary, IL

1 recommendation

#1
Private IPv6 ranges starts if FD (FD00::/8 range)

use a site like this one to generate random ID
»www.simpledns.com/private-ipv6.aspx

#2
FE80 is a link local, think of this like a MAC Address from IPv4 (although it is different, it is helpfull to think that way) can only be used on single LAN segment, see #1 for more appropriate addressing.

#3 yes... that would be a very long post... take #1
Prefix/L: fd
Global ID: 3f4b0c0c9d
Subnet ID: 1a14
Combined/CID: fd3f:4b0c:0c9d:1a14::/64
IPv6 addresses: fd3f:4b0c:0c9d:1a14:xxxx:xxxx:xxxx:xxxx

random generated on that page gives me
fd3f:4b0c:0c9d::/48 for whoel network and subnets
fd3f:4b0c:0c9d:1a14::/64
fd3f:4b0c:0c9d:random::/64
fd3f:4b0c:0c9d:random::/64
fd3f:4b0c:0c9d:random::/64
(random = 4 random hexidecimal digits)

for numbered interfaces (/30 in ipv4) you might use one of the
fd3f:4b0c:0c9d:random::/64
broke into
fd3f:4b0c:0c9d:random::0/126 (1/2 used on interfaces)
fd3f:4b0c:0c9d:random::4/126 (5/6 used on interfaces)
fd3f:4b0c:0c9d:random::8/126 (9/10 used on interfaces)
fd3f:4b0c:0c9d:random::12/126 (13/14 used on interfaces)

these 5 block sizes are likely all most ppl will need/run into
::/48 ::/56 ::/60 ::/64 and ::/126

fd3f:4b0c:0c9d::/48
fd3f:4b0c:0c9d:1a00::/56
fd3f:4b0c:0c9d:1a10::/60
fd3f:4b0c:0c9d:1a14::/64
fd3f:4b0c:0c9d:1a14::4/126

like so each 4 is a hexidecimal digit 2^4=16

cisco guide on subnetting
»supportforums.cisco.com/docs/DOC-17232


NetDog
Premium,VIP
join:2002-03-04
Parker, CO
kudos:81
reply to alishaheen
said by alishaheen:

1. which ipv6 range can be assigned in system, is there any specific range (eg,. private ip address in ipv4 10. 172. 192.168.) , which i can assign ?

IPv6 doesnt work the same as IPv4, no private IP addresses needed..

2. There is a ipv6 ip in the system staring with ( fe80::82c1::X:X:X..),
what does this address represents, shall i remove this address and assign any ipv6 address.

»lmgtfy.com/?q=ipv6+what+is+fe80

3. Is there any subnet mask concept in ipv6, if yes, how it works.

»lmgtfy.com/?q=ipv6+subnetting

A simple Internet search will give you all the information you require.. Just keep in mind IPv4 and IPv6 are worlds apart when it comes to address space.
--
Comcaster.. Network Engineer with NETO


janderso1
Jim
Premium,MVM
join:2000-04-15
Saint Petersburg, FL
reply to alishaheen
You might want to setup an IPv6 in IPv4 tunnel and use real routable IPv6 addresses. I use Hurricane Electric/tunnelbroker.net.

»tunnelbroker.net/?a=26543899873&···odsCAAMA
--
Jim Anderson